Measurements of the double polarisation parameters G and H in neutral pion photoproduction

Bussey, P.; Rutherglen, J.G.; Booth, P.S.L.; Carroll, L.; Court, G.R.; Edwards, A.; Gamet, R.; Hayman, P.; Holt, J.R.; Jackson, J. N.; Range, W.H.; Wooff, C.; Combley, F.; Galbraith, W.; Phillips, A. W.; Rajaratnam, V.H.

doi:10.1016/0550-3213(79)90341-9

Cited by 18 publications

(8 citation statements)

References 19 publications

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“…Few data exist from experiments with polarized photons and polarized target or from measurements of the recoil polarization. Data on O x and O z can be found in [68,72], on G in [70,71], and on H in [70]. Data on the helicity difference σ 3/2 − σ 1/2 were published in [42,43]; in Tables 2 and 3 we quote E which is defined as (σ 3/2 − σ 1/2 )/(σ 3/2 + σ 1/2 ).…”

Section: Bottom)mentioning

confidence: 99%

Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis

et al. 2010

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Abstract. Masses, widths and photocouplings of baryon resonances are determined in a coupled-channel partial wave analysis of a large variety of data. The Bonn-Gatchina partial wave formalism is extended to include a decomposition of t-and u-exchange amplitudes into individual partial waves. The multipole transition amplitudes for γp → pπ 0 and γp → nπ + are given and compared to results from other analyses.

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Section: Bottom)mentioning

confidence: 99%

Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis

et al. 2010

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“…For the γp→π 0 p reaction there are also data [74] for the double polarization parameters G and H. These data are important for fixing the sign of the amplitude F 2 , as is obvious from Eqs. (19) and (20).…”

Section: Predictions At Energies Below 3 Gevmentioning

confidence: 99%

“…Double polarization parameter H for γp→π 0 p reaction at different photon energies Eγ . The data are from Ref [74]…”

mentioning

confidence: 99%

Neutral pion photoproduction at high energies

et al. 2009

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A Regge model with absorptive corrections is employed in a global analysis of the world data on the reactions γp→π 0 p and γn→π 0 n for photon energies from 3 to 18 GeV. In this region resonance contributions are expected to be negligible so that the available experimental information on differential cross sections and single-and double polarization observables at −t≤2 GeV 2 allows us to determine the non-resonant part of the reaction amplitude reliably. The model amplitude is then used to predict observables for photon energies below 3 GeV. A detailed comparison with recent data from the CLAS and CB-ELSA Collaborations in that energy region is presented. Furthermore, the prospects for determining the π 0 radiative decay width via the Primakoff effect from the reaction γp→π 0 p are explored. PACS. 11.55.Jy Regge formalism -13.60.Le Meson production -13.60.-r Photon and charged-lepton interactions with hadrons -25.20.Lj Photoproduction reactions

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“…[26] 50 1822 − 2200 Ref. [34] For the γp → π + n reaction we use 6 measured observables. In this case, the data base is still dominated by older measurements before the year 2000.…”

Section: A Data Base For Pion Photoproductionmentioning

confidence: 99%

Single-energy partial wave analysis for π0 photoproduction on the proton with fixed- t analyticity imposed

et al. 2019

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High precision data of the γp → π 0 p reaction from its threshold up to W = 2 GeV have been used in order to perform a single-energy partial wave analysis with minimal model dependence. Continuity in energy was achieved by imposing constraints from fixed-t analyticity in an iterative procedure. Reaction models were only used as starting point in the very first iteration. We demonstrate that with this procedure partial wave amplitudes can be obtained which show only a minimal dependence on the initial model assumptions. * hedim.osmanovic@untz.ba

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Measurements of the double polarisation parameters G and H in neutral pion photoproduction

Cited by 18 publications

References 19 publications

Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis

Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis

Neutral pion photoproduction at high energies

Single-energy partial wave analysis for π0 photoproduction on the proton with fixed- t analyticity imposed

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